Name: Hylemonella gracilis (Canale-Parola et al. 1966) Spring et al. 2004

Category: Species

Proposed as: comb. nov.

Basonym: "Spirillum gracile" Canale-Parola et al. 1966

Etymology: gra’ci.lis. L. masc./fem. adj. gracilis, thin, slight, slender

Gender: feminine

Type strain: ATCC 19624; DSM 9158; IFO 14920; LMG 8201; NBRC 14920; VKM B-1405

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AF078753 Analyse FASTA

Valid publication: Spring S, Jackel U, Wagner M, Kampfer P. Ottowia thiooxydans gen. nov., sp. nov., a novel facultatively anaerobic, N2O-producing bacterium isolated from activated sludge, and transfer of Aquaspirillum gracile to Hylemonella gracilis gen. nov., comb. nov. Int J Syst Evol Microbiol 2004; 54:99-106.

IJSEM list: Euzeby JP. Notification list. Notification that new names and new combinations have appeared in volume 54, part 1 of the IJSEM. Int J Syst Evol Microbiol 2004; 54:633-634.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Synonyms:

  • Name	Kind
    Aquaspirillum gracile (Canale-Parola et al. 1966) Hylemon et al. 1973 (Approved Lists 1980)	homotypic synonym, validly published under the ICNP
    "Spirillum gracile" Canale-Parola et al. 1966	homotypic synonym, not validly published, basonym of name in Approved Lists

• Notes:
  • 🥇 Nomenclatural type of the genus Hylemonella Spring et al. 2004. Publication: Spring S, Jackel U, Wagner M, Kampfer P. Ottowia thiooxydans gen. nov., sp. nov., a novel facultatively anaerobic, N2O-producing bacterium isolated from activated sludge, and transfer of Aquaspirillum gracile to Hylemonella gracilis gen. nov., comb. nov. Int J Syst Evol Microbiol 2004; 54:99-106.
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 1, note = "Animal classification RG: 1 - Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No - Containment level: Containment Level 1". — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 1.
  • 🎓 Name mentioned 7 times in PubMed until 2024-03-27.
  • 🧍 According to Ludwig et al. (2021), this "species affiliates within Ottowia and may belong to the same genus". Publication: Ludwig W, Viver T, Westram R, Francisco Gago J, Bustos-Caparros E, Knittel K, Amann R, Rossello-Mora R. Release LTP_12_2020, featuring a new ARB alignment and improved 16S rRNA tree for prokaryotic type strains. Syst Appl Microbiol 2021; 44:126218.
  • 🧍 The basonym of Hylemonella gracilis (Canale-Parola et al. 1966) Spring et al. 2004 must be Aquaspirillum gracile (Canale-Parola et al. 1966) Hylemon et al. 1973 (Approved Lists 1980), not "Spirillum gracile" Canale-Parola et al. 1966 as cited in the paper by Spring et al. 2004. Publication: Hylemon PB, Wells J. JS, Krieg NR, Jannasch HW. The genus Spirillum: a taxonomic study. International Journal of Systematic Bacteriology 1973; 23:340-380.

Parent taxon: Hylemonella Spring et al. 2004

Assigned by: Spring S, Jackel U, Wagner M, Kampfer P. Ottowia thiooxydans gen. nov., sp. nov., a novel facultatively anaerobic, N2O-producing bacterium isolated from activated sludge, and transfer of Aquaspirillum gracile to Hylemonella gracilis gen. nov., comb. nov. Int J Syst Evol Microbiol 2004; 54:99-106.

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Record number: 776957